Not since the 1970's when denim began mainstreaming in the work place as acceptable office attire, now denim suit sets are no longer seen as overly coordinated.
Suiting is making a come back. Fashion clothing sites like Zara (pictured above) has a coordinated suiting collection that includes such simple articles as fleece available in two piece sets.
There is such a wide range of coordinated sets available that you can now control your personal level of tailored or casual wear to suit your mood or personality.